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THE POPULAR SCIENCE MONTHLY. 



nected with the nebula is most probable, but just what occurred 

 to produce it nobody knows. The observed appearances might 

 have been /produced by a collision, and no better hypothesis has 

 yet been suggested to account for them. 





o 



Near the opposite end of the constellation from a we find the 

 most interesting of triple stars in y. The two larger components 

 of this beautiful star are of magnitudes three and six, distance 



